Add property colDefault to fieldInfo object, set its true if there is

orm configuration default `orm:"default(1)"`

@@ -116,6 +116,7 @@ type fieldInfo struct {
 	null                bool
 	index               bool
 	unique              bool
+	colDefault          bool
 	initial             StrTo
 	size                int
 	auto_now            bool
@@ -280,6 +281,11 @@ checkType:
 	fi.pk = attrs["pk"]
 	fi.unique = attrs["unique"]
 
+	// Mark object property if there is attribute "default" in the orm configuration
+	if _, ok := tags["default"]; ok {
+		fi.colDefault = true
+	}
+
 	switch fieldType {
 	case RelManyToMany, RelReverseMany, RelReverseOne:
 		fi.null = false